We have just bought a new machine, it is a Dell presicion 360, 3 Ghz,2 Gb ram, Nvidia FX500 (driver 4403).
I did a benchmark test, a Specapc test and it ran 5 times.
Test Averages for 5 tests. Test Total = 394 Graphics = 240 CPU = 83 I/O = 72
Then I enabled Hyper Threading.
Test Averages for 5 test(s). Test Total = 388 Graphics = 241 CPU = 74 I/O = 74
So my little conclusion must that I gain in SolidWorks with Hyper Threading.
If anybody else can make the same test, it could be interesting to see if you can get same result.
I wish you all a merry Christmas and a happy New Year.